Object to it.

"What?, No, baby. I'm not going to do that again... it was a one time thing okay? I can't believe I did.." But she cut me off.
"You're going to do it again whenever I tell you to. And you know you loved it. I can tell from the way you were so eager!"
"But..." I try to object uselessly before she shuts me down again. "Shut up baby. The next word I want to hear from your lips is 'Okay'".

I pause, finding it hard to say the words.

"WELL?" Melanie demands again.

"Okay..." I mumble quietly. Ashamed of my admission.
"Okay, what?" My wife pushes me further. I look up at her, seeing that she's determined. "Okay, I'll lick it like this again if you tell me to."
"Be more specific baby, tell me what you'll do." She fires back.
"Okay, If you come home... with cum in your pussy... and want me to lick it out... I'll do it, okay?" The words are hard to get out, but I stumble my way through it until I've finished what I know she wants to hear.

"Good, now get your tongue back down there and lick my holes," my wife instructs me after my admission.
"Don't stop until I tell you to. I'm going to reminisce about Dan and my coffee guy. And think of who's next..."